Preparation of Building Ceramics with High Strength-Toughness and High Flexibility by a Mechanical Activation Method
NIE Guanglin1,2,*, LIU Yijun1,*, WANG Qinggang1, HUANG Lingyan1, WU Yang1, PAN Limin1, BAO Yiwang3, RAO Pinggen2
1 Postdoctoral Research Center, Monalisa Group Co., Ltd., Foshan 528211, Guangdong, China 2 School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China 3 State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China
Abstract: In order to greatly enhance the mechanical properties of the building ceramic, a mechanical activation method (MA) was used to pretreat the building ceramic powder, and the effects of MA time on the properties of building ceramic powder, green and sintered bodies were investigated. The strengthening-toughening mechanisms of building ceramics after the MA treatment were also demonstrated based on the phase composition and microstructure analyses. The results indicate that MA can be adopted to reduce the particle size of ceramic powder, enhance the sinte-rability and promote the densification process of ceramic green body, which are conductive to improving the relative density of building ceramic and reducing the number and size of pore flaws in ceramic, resulting in the high densification strengthening for the ceramics. Besides, the MA is favorable for refining and homogenizing the corundum and quartz particles, promoting the dissolution of quartz into the liquid phase and boosting SiO2 content in the glass phase matrix, improving the crystallinity and aspect ratio of the mullite phase, and enlarging the facture surface roughness and the crack propagation path in ceramic, thus resulting in the enhanced dispersion strengthening, matrix reinforcing, mullite strengthening and the crack deflection toughening effects. Afterwards, the building ceramic can be effectively strengthened and toughened. The mechanical strength, toughness and flexibility of building ceramic samples were enhanced gradually with the increase of MA time. The flexural strength ((88.2±6.3) MPa), fracture energy ((390.5±44.2) J/m2) and failure strain ((10.24±0.48)×10-4) of the ceramic sample prepared with MA treatment for 40 min were 52.8%, 112.6% and 39.1% higher than those of the sample prepared without MA treatment, respectively, indicating that MA is an effective way to strengthen-toughen the building ceramics and to enhance their flexibility. Moreover, this method is simple in operation and has substantial prospects in the preparation of building ceramic slabs with high strength and toughness.
聂光临, 刘一军, 汪庆刚, 黄玲艳, 吴洋, 潘利敏, 包亦望, 饶平根. 基于机械活化法制备高强韧高柔性建筑陶瓷[J]. 材料导报, 2023, 37(24): 22040120-9.
NIE Guanglin, LIU Yijun, WANG Qinggang, HUANG Lingyan, WU Yang, PAN Limin, BAO Yiwang, RAO Pinggen. Preparation of Building Ceramics with High Strength-Toughness and High Flexibility by a Mechanical Activation Method. Materials Reports, 2023, 37(24): 22040120-9.
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